Incorporating Writing in Math

I’ve been trying to incorporating more writing in my classes.  I say this every year, but now I actually have a battle plan.

Writing in mathematics is more important than ever.  Writing helps students justify their answers and develop their mathematical vocabulary.

My bellwork is normally just a quick skills practice from the day before or a skill that will make the lesson go smoother.  However, I’m now giving my students writing as their bellwork once or twice per week.  It’s nothing ground-breaking, but it’s definitely an improvement over what I had been doing.

Here are some of the writing prompts my students have had.  Notice that I frequently have to remind them to write in complete sentences :(
Incorporating Writing in Math - algebra and geometry warmups  |  mrseteachesmath.blogspot.com 
Incorporating Writing in Math - algebra and geometry warmups  |  mrseteachesmath.blogspot.com 
Incorporating Writing in Math - algebra and geometry warmups  |  mrseteachesmath.blogspot.com 
Incorporating Writing in Math - algebra and geometry warmups  |  mrseteachesmath.blogspot.com
Incorporating Writing in Math - algebra and geometry warmups  |  mrseteachesmath.blogspot.com
How do you incorporate writing into your math classes?

Bellwork borders by Mad Clips Factory